It appears that your device was connected on a slower Wi-Fi frequency. By restarting your device, it was able to reconnect to the faster frequency. If you have a larger home, you might want to add a Wi-Fi extender like TELUS Boost Wi-Fi. This will help to extend faster Wi-Fi frequencies, which typically have a smaller range, throughout all areas of your home.
Learn more about TELUS Boost Wi-Fi.